MSI KT3 Ultra video/ram trouble

[Cerb]

OK, I made a new machine for a friend, and here's the specs:
MSI KT3 Ultra-ARU
Athlon XP 2000+
300w Sparkle PSU
1x 512MB Kingston PC2100
80GB WD Caviar
generic 32x12x48 CDRW
Abit Siluro GF4 Ti 4600

Now, up through the winxp install and 4in1 install, all went great. Not one single problem. Got the 4.38 4in1s, newest dets and DX 8.1 on...all was good.

Restarted several times putting on 3Dmark, Sandra, etc.
Great. The benchmarks are all matching with comparable parts in sandra, and the 3Dmark score is only a few % below the normal for hardware site benchmarks (which just means I'm on a non-tweaked machine).

Then, I restart...beep, beep, beep.
Check the DLED...looks like it is stuck on memory. Reseating memory and changing DIMM slots does nothing.
Reseat the GF4 and it starts flwlessly.
I can't very well give the machine to him like this, so any idea what is going on?
In addition, when I shut down from WinXP, it tries to restart (but can't, as stated above) instead of shutting down. May not be related, but can't be too certain.

TIA

 

[cobysdad]

I had very similiar problems on 2 mb's and it turned out to be a bad powersupply. 300 watts isn't enough for what your running either.

 

[Cerb]

300w not enough? What is this world coming to?!
Why is it that this only happens on shutdowns?
My 300w enlight runs similar hardware just fine (OC'd Athlon 1800+ to a bit over 1.6GHz, and OC'd GF4 Ti 4200, enough to meet the 3Dmark of the 2000+/Ti4600 machine), and shuts down normally...should I try switching PSUs, or not bother?

 

[Cerb]

Well, I switched PSUs...everything runs fine. The sparkle works fine in my machine, my enlight works in his.